Thread: Carbatec Dust Deputy

I somehow do not think that the CT33/CT22 is appropriate for this application. There are other dust extractors for this. I reckon the dust deputy will help just a little as the cyclone is only effective in keeping the heavier particles away from the extractor.
Regards
Les

Originally Posted by lesmeyer

I somehow do not think that the CT33/CT22 is appropriate for this application. There are other dust extractors for this. I reckon the dust deputy will help just a little as the cyclone is only effective in keeping the heavier particles away from the extractor.
Regards
Les

I agree Les, I believe the more specific dust extractors have a end stage filter that is automatically and constantly cleaned. The Festool reusable cloth bags would be slightly less prone to clogging than the paper ones, but they cost a fortune.

It does suggest something about the efficiency of the cyclonic systems, they do not deal well with the fine stuff that really clogs the filter and reduces the dusty's efficiency.
Regards,
Zelk

Plaster dust in disposable bags is a real issue for non-specialised extractors. I don't tend to do a lot of sanding of plaster dust, but that I mean a days and days worth. But I have successfully used my old CT33+disposables for plaster joint sanding with no significant issues. The difference might have been combining plaster dust and otehr dust by regularly changing between tasks. I might do general cleaning up, then some sawing, some joint sanding, some general cleaning up, some more joint sanding, etc, etc. I am not talking about hopping about between tasks every 5 minutes, maybe half a day doing one thing, then on to another.

Possibly the combination of the different dust types and particle sizes in the bag helps avoid the issue, versus just joint sanding which definitely is a problem with dust caking up inside the bag.

Not sure if the presents any possible options, but is my experiences.

I agree with Les, I am not sure cyclones are suitable as they are deigned to remove heavy particles and the fine stuff goes through to the extractor. But I am not a cyclone user, I opt for the LongLife bags in Festool extractors.

Originally Posted by nt900

Plaster dust in disposable bags is a real issue for non-specialised extractors. I don't tend to do a lot of sanding of plaster dust, but that I mean a days and days worth. But I have successfully used my old CT33+disposables for plaster joint sanding with no significant issues. The difference might have been combining plaster dust and otehr dust by regularly changing between tasks. I might do general cleaning up, then some sawing, some joint sanding, some general cleaning up, some more joint sanding, etc, etc. I am not talking about hopping about between tasks every 5 minutes, maybe half a day doing one thing, then on to another.

Possibly the combination of the different dust types and particle sizes in the bag helps avoid the issue, versus just joint sanding which definitely is a problem with dust caking up inside the bag.

Not sure if the presents any possible options, but is my experiences.

I agree with Les, I am not sure cyclones are suitable as they are deigned to remove heavy particles and the fine stuff goes through to the extractor. But I am not a cyclone user, I opt for the LongLife bags in Festool extractors.

I don't seem to get through half an hours work without noticing a drop in suction and as I said the bag could be almost empty. What you said about varying the substance vacuumed could be a solution. I wonder if occasionally vacuuming a cup of sand would shake off the caked on plaster dust.

Anything is worth a go. Not discounting cyclone either at this stage.

I found that sanding plaster joints with a CT-MINI used to give me troubles, with dust caking up on the inside of the bag under the filter. About 20 minutes I would get before notice significant loss of suction. I open the extractor, tap the top of the bag, and get back into it for another 20 minutes. But I know others who successfully use CT-MINI for joint sanding, so I can't explain why they have no issues - which is great. But that contradiction has had me scratching my head for a few years now.

Originally Posted by nt900

Anything is worth a go. Not discounting cyclone either at this stage.

I found that sanding plaster joints with a CT-MINI used to give me troubles, with dust caking up on the inside of the bag under the filter. About 20 minutes I would get before notice significant loss of suction. I open the extractor, tap the top of the bag, and get back into it for another 20 minutes. But I know others who successfully use CT-MINI for joint sanding, so I can't explain why they have no issues - which is great. But that contradiction has had me scratching my head for a few years now.

Could varying the suction on the dusty as well as the speed of the orbital sander reduce the problem?

Not sure. I don't think changing sander speed will make a difference, but try changing extractor speed. Something I have not experimented with and would be keen to hear how it goes.

I have a question, how long has the joint been set for before sanding?

Originally Posted by nt900

Not sure. I don't think changing sander speed will make a difference, but try changing extractor speed. Something I have not experimented with and would be keen to hear how it goes.

I have a question, how long has the joint been set for before sanding?

It had been set for at least a few days.

I was thinking of making a shroud that would, with the dusty lid open, fit over the filter housing and be connected to another portable vacuum cleaner, reversing the air flow to clean the filter.
Zelk

Just thought I would check you were not sanding 'wetish' joints. Sorry for the silly question.

I might have missed an earlier point, are you getting plaster dust on your main filters then? It's not just about clogging up inside the bag?

Originally Posted by nt900

Just thought I would check you were not sanding 'wetish' joints. Sorry for the silly question.

I might have missed an earlier point, are you getting plaster dust on your main filters then? It's not just about clogging up inside the bag?

It's both, the dust somehow gets out of the bag and into the filter.
Z

Originally Posted by zelk

It's both, the dust somehow gets out of the bag and into the filter.
Z

That's should not be happening. Although it's been a while since using a CT33 with disposable bags, there should not be any dust coming through the paper bags material. And none should be leaking out of anywhere else either.

How much is getting into the filters then?

Originally Posted by nt900

That's should not be happening. Although it's been a while since using a CT33 with disposable bags, there should not be any dust coming through the paper bags material. And none should be leaking out of anywhere else either.

How much is getting into the filters then?

Enough to make me want to clean the filter. This has happened with two bag so far, I was quite surprised as there was no visible damage to the bag. Some dust would settle on top of the bag, I suspect it is dust that has fallen off the filter and onto the bag.
Z

In most cases any dust in the filters is caused by the bag removal and replacement process. Inevitably some spillage somewhere into the container and its ends up in the filter. But once cleaned out of the container and filter, you should not really get any dust in the filters again.

I have to think about this.

I've been using the DD for about a year now in front of my ct22 and have had to clean the filters and replace a bag 2 or 3 times since starting using. Thats with building 2 recording studios cutting and sanding timber, cutting straw panels and sanding plaster joints and demoing at the wood show the Torque Work Centre surfacing burls.
With the plastering a fair amount does go into the DD but the slower the air flow the better and the sander I use is the porter and cable drywall so maybe that helps also